#include "adc.h"
#include "SysTick.h"


void ADCx_Init(void)
{
	GPIO_InitTypeDef GPIO_InitStructure; 
	ADC_InitTypeDef       ADC_InitStructure;
	
	RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB|RCC_APB2Periph_ADC1,ENABLE);
	
	RCC_ADCCLKConfig(RCC_PCLK2_Div6);
	
	GPIO_InitStructure.GPIO_Pin=GPIO_Pin_1;//ADC
	GPIO_InitStructure.GPIO_Mode=GPIO_Mode_AIN;	
	GPIO_InitStructure.GPIO_Speed=GPIO_Speed_50MHz;
	GPIO_Init(GPIOB,&GPIO_InitStructure);
	GPIO_InitStructure.GPIO_Pin=GPIO_Pin_0;//ADC
	GPIO_Init(GPIOB,&GPIO_InitStructure);



	
	ADC_InitStructure.ADC_Mode = ADC_Mode_Independent;
	ADC_InitStructure.ADC_ScanConvMode = DISABLE;
	ADC_InitStructure.ADC_ContinuousConvMode = DISABLE;
	ADC_InitStructure.ADC_ExternalTrigConv = ADC_ExternalTrigConv_None;
	ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;	
	ADC_InitStructure.ADC_NbrOfChannel = 1;
	ADC_Init(ADC1, &ADC_InitStructure);
	
	ADC_Cmd(ADC1, ENABLE);
	
	ADC_ResetCalibration(ADC1);
	while(ADC_GetResetCalibrationStatus(ADC1));
	
	ADC_StartCalibration(ADC1);
	while(ADC_GetCalibrationStatus(ADC1));

	ADC_SoftwareStartConvCmd(ADC1, ENABLE);
}


u16 Get_ADC_Value(u8 ch,u8 times)
{
	u32 temp_val=0;
	u8 t;
	
	ADC_RegularChannelConfig(ADC1, ch, 1, ADC_SampleTime_239Cycles5);				    
	
	for(t=0;t<times;t++)
	{
		ADC_SoftwareStartConvCmd(ADC1, ENABLE);
		while(!ADC_GetFlagStatus(ADC1, ADC_FLAG_EOC ));
		temp_val+=ADC_GetConversionValue(ADC1);
		delay_ms(5);
	}
	return temp_val/times;
} 
